I highly recommend the book "plant medicines and the imaginal realm". I've worked extensively with indigenous curanderos (healers) many of who view depression

I highly recommend the book "plant medicines and the imaginal realm". I've worked extensively with indigenous curanderos (healers) many of who view depression as a sickness undigested emotions and past trauma. This sickness negatively affects perception of their present moment. In plant medicine ceremony, when past trauma is processed it's frequently accompanied with throwing up which is called "purging" or "getting well". Outside of ceremony plants are often prescribed as a purgative which are often drunk accompanied by copious water. Purging may happen in both directions. There is so much to experience in that field, so many lines of beautiful inquiry and in ceremony often a feeling of eternal present moment. The book puts forward how depression and other sickness come from an altered perception that can be restored by plant medicines.